<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    #center{
      border:1px solid #000000;
    }
    #center::after{
       content:"聂茹风";
       display: block;
       height:140px
    }
    ::selection{
        back
    }


    .innerdiv{
      width:125px;
      height:140px;
      background-color: #EDB21C;
      border:1px solid red;
      float:left
    }
    #d3{
       width:125px;
      height:140px;
      background-color: blue;
      border:1px solid red;
    }

  </style>
</head>
<body>
  <div id="center">
        <div class="innerdiv"  id="d1">
            1
        </div>
        <div class="innerdiv" id="d2" >2</div>
        <div class="innerdiv" id="d3">3</div>
        <div class="innerdiv" id="d4">4</div>
        <div class="innerdiv" id="d5">5</div>

    </div>
</body>
</html>